Brake mechanism.



e. s. ACKL EY.

BRAKE MECHANISM.

APPLICATION FILED APR. 16- I917.

Patentedfiuly 2,191&

2 SHEETST'SHEET I I/L%ZENTOI% I "8) carp;

G. S. ACKLEY.

BRAKE MECHANISM.-

APPLICATION nuau APR. 16. 1911.

2 SHEETS-SHEET 2.

Patented July 2, l91&

omrrm s. ACKLEY, or BROOKLYN, NEW YORK, assrenon To a. s. AGKLEY & 00., on NEW YORK, N, Y., A COPABTNERSHIP CONSISTING or GRIFFIN s. AcKLEY Am) HELEN I. ACKLEY.

BRAKE MECHANISM.

7 all whom it may concern:

Be it known'that GRIFFIN S. ACKLEY, a citizen of the United States, and resident-of the. city of New York, borough of Brooklyn, county of Kings, and State of New 'York,

has invented certain new and useful Improvements. in Brake Mechanism, of which the following is a specification.

- This invention relates to mechanism f0 controlling thebrakes and in its main features is adapted more particularly for use 7 in connection with car brakes of the type in which the brake is operated by means of a chain or the like wound upon a suitable niember which is generally operated manu a ly, The present invention is an improvement over those set forth in my prior Patents Nos. 1,002,551 and 1,158,764 and operates broadly 'on the same principles, com rising in its general combination a win ing or power drum on which the brake chain is adapted to .be wound and on which also a check chain is wound inopposition to the brake chain.

The present invention has the same gen- V feral ob ect of economy of space and. easy operation as those set forth in my above mentioned previous patents while in addition it has for its objects to cheapen the con-- struction and decrease the welght of the brake mechanism,-a further object being to insure a quicker withdrawal of the-brake shoe or brakeproper from the wheel.

The construction by which these objects are attained will be. fully set forth in the v following specification taken in connection 7 with the accompanying drawings, the various combinations and arrangements of parts constitutmg the present invent on bem more particularly set forth in the appende claims.

Figure 1 of the drawings is a face v1ew partly broken away of a brake operating Specification of Letters Patent. 4

Application filed April 16, 1917, Serial No. 162,290.

Patented J y 2; 1918.

- proximately on the lirie-5-5. of Fig. 1 and showing particularly the mounting of the foot operated pawl. I

Fig. 6 is a front view showing a modified means ofoperatively connecting the hand wheel shaft to the winding drum.

Fig. 7 is a side elevation, partly broken away showing a mddified manner of applying the invention to a car.

A portion of the latform of a car is shown at 1. Upon th1s platform, referring now more partlcularly to Figs. 1 and 2, is mounted an open bottomed casing or hous-' ing 2 which may be securedto the platform 'by any suitable means as thebolts 3. J our.-

sprocket wheel 10 over whichis looped a sprocket chain 11 which extends upwardly and passes over a relatively small sprocket e 12 fixed on a shaft 13 journaled in a whe second casing 14 as will be presently pointed out and adapted'to be rotated by a handwheel 15.

The casing 14 is supported at the proper distance above the platform for convenient operation of the hand-wheel by means of a pair of pipes 20 and 21 which are screwed at their lower ends into suitable tapped openings in the top of the lower casing or housing 2 and which have the casing 14 mounted on their upper 'ends. As here shown the upper ends of the pipes 20 and 21 are exteriorly threaded as at22 and pass freely through openings 23 in the bottom of thecasing, the latter resting upon nuts 24 threaded on the pipes while lock nuts 25 are threaded over the ends of the pipes projectingthrough the openings 23 and serve to rigidly secure the casing in position. It will be apparent that by adjusting the nuts 24 and 25 on the pipes a corresponding vertical adjustment of the casing, and consequently of the sprocket wheel 12, to properly tension the sprocket chain 11 may be effected. As will be noted the pipes 20 and 21 extend tangentially to the sprocket wheels 10 and 12 and thus serve as conduits for the opposite reaches of the sprocket chain 11.

The casing may be provided With a removable cap 1 1' for access to the interior thereof. :Tl'he manner of operatively connecting thehh' dwheel to the shaft may be substantially imila'r .to that disclosed in my previous Patent-No. 1,158,764 above referred to. In the present device the shaft is squared throughout, a portion of. its length, having at opposite ends rounded'portions one of sleeve by a coiledspring36bearing be-f tween the sprocket wheel 12 and the sleeve .25

which bears in a suitable opening in one wall cent end of a second sleeve 34, which latterisslidable on the squared portion of the shaft 13, are ratchet teeth .35, the sleeve 34 being normally pressed intoengagement. -w1th, the

'34. This arrangement 1 provides for the backward rotation of the handwheel independently of the shaft 13, To lubricate the sprocket chain and wheels an oil cupi37 may be mountedas shown on one of'the pipes 20;, 21 the inclined position of the pipe causingv the latter to form a trough to conduct the oil down upon the lower sprocket Wheel.

Referring now more particularly to the mechanism contained in thehousing 2, the

drum 6, as shown most clearly in Fig. 2, is-

' formed in two sections, 41 and 42, between which the sprocket Wheel 10 is located, the brake chain 7 winding on the section 41 and the check chain 8 on thesection '42. Each of these sections is spirally grooved in its periphery to receive its chain and constitutes in effect a cone increasing in diameter to ward the center of the drum where each is provided with registeringlugs 43 and 44 through which a bolt 45 is passed by means Y of which the chains 7 and 8 are fastened to the drum. In the construction shown in Figs. '1 and 2 the check chain 8, instead of being fastened at its opposite end to the brake chain as in my previous patents is. preferably carried upwardly from the drum,"

through a short pipe 47 screwed" into the top of the housing 2, and attached at its other end to. said pipe 47, being preferably attached to a coiled spring 48 which 'may be hung from a' hook 49 secured ina cap 50 on the top of the pipe 47. Y

I The brake chain 7 .-passes down from the drum through a, suitable opening in the platform 1 and over a pulley 56- located bef neath the platform. As a feature of the present invent-ionI prefer to mount this pulley in Ma manner to'cause it to assist in the rapid unwinding of the chain when freeingthe brake shoes from the car Wheel and to this end the pulley'is journaled in the free ends of a pair of swlnging arms 57 which are p1voted as-at 58 to.a bracket 59 fixed to the underside of the platform. "A pair of'springs 60, secured at one end'to the, arms 57. and at opposite ends to the bracket 59 normally tend to swing the pulley in a direction away from the brake shoe. Aswill be apparent from the relative positions of the parts shown in Fig. 2,-when' the drum is freed to release the brake the pulley 56 moves rapidly under. the influence of the springs 60 in a manner to lengthen the path of the.

brake chain 7 from the drum to the brake and thus acts to cause a quick unwinding of the drum and release of the brake chain. 1

Swinging movement of the pulley in oppo- I site directions is preferably limited by means -of stops 61 and 62 formed on the bracket 59 and adapted to be engaged by the arms 57 as the pulley swings in opposite directions.

The drum is releasably locked against unwinding movement by means of a ratchet wheel 65. fixed thereto and engaged by a gravity-release pawl 66 .whi'chis moved against the ratchet Wheel by afoot lever 67 pivoted as at 68 to thehousing 2 and having 1 a Slot and pin connection 69 with the pawl 66, thelever 67 projecting at its free end through an opening 70 in the housing and being provided with afoot pedal 71. It will be apparent that with arrangements of parts just" described, with the power drum located as close as possible to the platform, a simple construction, and

one combining great strength and rigidity with a comparatively small weight, will be provided. 1

In Fig.6of the drawings I have shown a modified means for transmitting power from the shaft 13 to the. drum 6 in which a small drum 80is mounted on the shaft 13 instead of the sprocketwheel 12while the "drum 6 is provided with an intermediate cylindri-.

cal section 81 in place of the sprocket Wheel 10, a suitable rope 82 passing over these drums,- being preferably attached to each drum in any suitable manner and given enough turns around each drum to permit of the necessary winding and-unwinding movement.

In Fig. 7 I have show'n amodi'fied applirod cation.ofxtheinvention to a car and which is adapted for use in connectionwith a ver- .tical brake staff.

In this modification the-car platform is indicated at 85. Secured to theunderside of the platform at, the proper point for locating the brake staff is a casing 86 through which the lower end of the brake stafi 88 projects. The brake staff may be provided with suitable anti-friction bearings .89

where it passes through. the platform. Fixed to the brake staif just above-the platform isaratchetwheel 90 adapted to be i so engaged by a pawl 91 to hold the brakes set. Upon the lower end of the brake staff within the casing 86 is fixed a sprocket wheel 92.

5 Secured to the undersideof the car platwhich may be desirable or convenient is a drum consisting'of two sections 96 and 97,

' drum section 97 by a common bolt as previously described, the check chain in this form to'the rear of the casing 86 at any point housing 95 in which is suitably journaled a as in the previously described modification,

while a check chain 101 is attached to the modification however, leading from the drum in the same direction as the brake chain 100 and being connected to the latter at a suitable distance from the drum as in my above mentioned PatentNo. 1,158,764.

The reaches of the sprocket chain 99 are inclosed in pipes 103 and 104 corresponding ,to the pipes 20 and '21 and these pipes may be either set freely in suitable openings in the casing 86 and housing 95 or may be hung from the car platform by suitable hangers indicated at 105 and 106. I

The operation of both modifications'will, it is thought, be apparent from the above mentioned. description since it will be obvious that the rotation of the shaft 13 or brake staff 88 will cause a corres onding rotation at reduced speed of the rums 6 and 6. During winding of the brake chains the check chains unwind and when the brake chains unwind the check chains wind and so limit the unwinding movement to obviate taking up unnecessary slack at the be-- ginning of the winding. operation.

As many changes could be made'in the drum, a housing adapted to rest on a car above construction and many apparently widely different embodiments of my invention designed without departing from the scope of the appended claims, I intend that I all matter contained in the above descrip- 'tion or shown in the accompanying drawing shall be interpreted as illustrative merelyv of an operativev embodiment of my invention and not in a limiting sense.

'.What I claim is:-'

1. In a brake mechanism, a winding drum, a housing therefor, a pair of pipes projecting upwardly from said housing, a casing mounted on the upper ends of said pipes, a handwheel shaft mounted in said casing, and mea'nsfor rotating said drum from said handwheel shaft, including a flexible' member extending through said pipes.

2. In a brake mechanism, a winding drum, 2. housing therefor, a pair of pipes looped over the projecting upwardly from said housing, a

casing mounted on the upper ends of said pipes, a handwheel shaft mounted in said casing and. means for rotating said drum from said handwheel shaft, including a flexible member extending throughsaid pipes, and means for adjusting said casing vertically upon the upper end of said pipes.

3. In a brake mechanism, a 'winding drum comprising two sections each increasing in diameter from the end toward the center of the drum, a brake chain attached attached to the other section. H

4. In a brake mechanism, a winding to one of said sections and a check chain drum comprising two sections each increasing in diameter from the end toward the center of the drum, a brake chain attached to one. of saidsections and a check chain ,attached to the other section, means for rotating said drum, said means being connected to the said drum between the said sections.

5. In a brake mechanism, a winding.

drum having two sections each of increasin diameter and upon which the brake an check chains are adapted to be wound, respectively, a housing inwhich said drum is mounted, a brake chain attached at one end to saiddrum, and a'longitudinally resilient check chain attached at one end to. the said drum.

6. In a brake mechanism, a winding and at its opposite end to the housing, said check chain extending from the drum in an opposite direction to the brake chain.

In a brake mechanism, a winding platform in which said drum is mounted, a pipe extending upwardly from said housing, a brake chain attached at one end to said drum and extending downwardly therefrom, and a check chain attached at wardlv in and attached at its opposite end to sai ipe. I

8. In'a brake mechanism, in combination with a brake chain and a winding drum therefor, of a bodily movable pulley over which said brake chain passes, and means acting to'automatically move said pulle in a direction to unwind the brake chain the drum when the brake chain is released. 9. In a brake mechanism, in combination with a brake chain and a winding drum therefor, of a pulley over which said brake chain passes, a swingin arm on which said pulley ,iS mounted, an a spring normally rom 115 one end to said drum and extending up f I v 1,270,762

pulling said armin a direction to unwind said last mentionedmeans and said drum,

the brake chain from the drum. and a. pair of pipes extending between said 10 V 10. In 'a brake mechanism, a winding housing and caslng andhavingthe 'pppoadrum, .a' hou'sin whichwsaid drum is site"reaehes of said flexible member'extend- S -mounted, a ,casmg located at" a distance in therefihr0ugh.. V

' from said housing, means for imparting 1%igned'at the city, county and State of rotation to said drum carried by said 021s- New York, this5th day of April, 1.916.- j g, 1..-fl exib1e member extending between' GRIFFINYS. ACKLEY. 

